Rio de Janeiro Is Training Police to Be More Civil in Effort to Combat the Force's Reputation for Brutality, Ahead of World Cup

RIO DE JANEIRO—Sticking her head out of a squad-car window, a young Brazilian police recruit shouts to the passengers of a car in front of her to exit their vehicle.

But she is quickly scolded by her trainer, who tells her to use a megaphone, to speak calmly, address people as "citizens" and to "say please." "Please," she tries again, slowly and carefully. "Citizen, exit your vehicle....